Hamilton is located 6 miles west of the county seat Leesburg at 39°8′2″N 77°39′51″W / 39.13389°N 77.66417°W / 39.13389; -77.66417 (39.133889, −77.664151),[5] near the western base of Catoctin Mountain.

According to the United States Census Bureau, the town has a total area of 0.2 square miles (0.6 km2), all of it land.

[6] Growth ensued and by 1833, the area had enough population to sustain Harmony Methodist Church, which was built on land donated by Richard and Ann Hatcher Tavenner.

[6] The last important Civil War action in Loudoun County, known as The Harmony Skirmish, took place on March 21, 1865, as confederate Colonel John S. Mosby and his troops surprised troops commanded by Colonel Marcus Reno.

[6] The booming businesses in Hamilton included two newspapers, a butcher shop, a men's clothing store, a broom factory, a milliner, a dentist, two hardware stores, a stove shop, a flat racecourse, a livery stable and boarding houses.

[9] The only primary highway directly serving Hamilton is Virginia State Route 7 Business.

Virginia State Route 7, which originally followed Colonial Highway through Hamilton, now bypasses the town just to the north.

Via SR 7, travelers may head westward to Winchester or turn eastward, eventually reaching Alexandria.